Beginners and decorative items are usually best served by PLA, functional parts that need durability work well with ABS, and a middle ground with good strength and easier printing than ABS is offered by PETG. Whether you prioritize ease of use, strength, or temperature resistance determines your choice; PLA gets chosen by most hobbyists initially, then other materials are moved to as their needs grow.
Fast Facts
- PLA prints at 190-220°C and requires no heated bed
- Temperatures up to 80°C can be withstood by ABS before deforming occurs
- PETG combines 70% of ABS strength with PLA-like printing ease
- Over 60% of hobbyist prints use PLA filament
- All three materials are often used by professional prototyping depending on testing requirements
Understanding PLA: The Beginner’s Choice
Most newcomers to 3D printing choose PLA, and good reasons exist for this. Lower temperatures allow this corn-based plastic to print easily, and warping doesn’t occur like with other materials. Almost any desktop printer can be used to print PLA without a heated bed; this makes it accessible for home workshops and classrooms.
Limits exist with PLA, though. Softening starts around 60°C, so deformation can happen to parts left in hot cars or near heating vents. This was learned the hard way by a local student in St. Catharines when their custom phone case warped on a sunny dashboard. Still, PLA remains the go-to choice for prototypes, decorative items, and learning projects.
ABS: The Workhorse Material
Manufacturing has used ABS for decades before 3D printing existed. Higher temperatures can be handled by this petroleum-based plastic, chemicals are resisted better, and impacts that would crack PLA are bounced back from. ABS often gets reached for by professional shops when parts will see real-world use.
Printing difficulty is the downside. A heated bed, enclosed chamber, and good ventilation are needed by ABS due to fumes. Warping happens easily if cooling isn’t controlled. Yet when correct printing occurs, ABS parts can be sanded, drilled, and even welded together; many functional prototypes get made with ABS because final production materials are behaved like more closely.
PETG: The Balanced Option
The difference between PLA’s ease and ABS’s strength is tried to be split by PETG. Almost as easily as PLA does this glycol-modified plastic print, but better impact resistance and temperature tolerance are offered. Crystal clear results are also achieved when printed thin, making it popular for containers and display items.
From what we’ve seen, parts that need some flexibility without breaking work well with PETG. Brittleness like PLA develops over time doesn’t occur, and moderate heat gets handled better. Print beds are also bonded well to by the material, sometimes too well. Build surfaces have had to be replaced by more than one maker after PETG stuck permanently.
Choosing Based on Your Project Needs
What you’re building and how it will be used determines the right filament choice. PLA often works fine for decorative items, educational models, and concept prototypes. ABS or PETG are typically needed by functional parts, tools, and anything exposed to heat.
Your printer setup should be considered too, I suppose. Basic machines work with PLA, while an enclosed printer with good temperature control is really needed by ABS. PETG falls somewhere between; most heated bed printers print it well. PLA and PETG might be stuck with by a hobbyist with a simple desktop printer, while ABS capability might be invested in by someone doing functional prototyping.
Material Properties in Practice
Different behavior during and after printing is shown by each filament. Less shrinkage as it cools is experienced by PLA, making dimensional accuracy easier to achieve. More shrinkage occurs with ABS but acetone post-processing can be used to smooth layer lines completely. Stringing between parts tends to happen with PETG but very strong layer adhesion gets created.
Temperature resistance varies significantly. Hot cars or direct sunlight can cause deformation in PLA parts. Automotive under-hood temperatures are handled by ABS without issues. PETG sits in the middle; most indoor applications work fine but extreme heat doesn’t. A similar pattern is followed by chemical resistance, with solvents that would dissolve PLA being handled by ABS.
Cost and Availability Considerations
The least cost is typically found with PLA and the widest variety of colors and specialty formulations are available. Slightly more is cost by ABS but consistent quality across brands is offered. The higher end of common filament pricing is usually occupied by PETG but much more availability has been achieved recently.
Ongoing projects are affected by local availability. PLA is carried by most hobby stores, ABS is stocked by fewer, and PETG availability varies by region. In areas like St. Catharines, better selection and pricing than local retail is often provided by ordering online. Project delays when specific materials run out are helped to be avoided by planning ahead.
Making Your Decision
Your project requirements should be started with and material choice worked backward to. Impact resistance but not high temperature tolerance is needed by a custom phone case, making PETG a good fit. ABS durability might be needed by a prototype gear that will be tested under load. PLA could work perfectly for a decorative lamp shade.
Your experience level and equipment should be considered too. No shame exists in choosing PLA for its ease of use, especially when learning. “Basic” materials allow many successful projects to get completed because design rather than exotic filaments was focused on by the maker. When you’re ready to explore more challenging materials, every step of the way gets guided by us. Your specific project needs can be discussed by visiting our website.
Mini-FAQ
Q: Which filament should beginners start with? Most beginners are recommended to use PLA. Lower temperatures are needed for printing, a heated bed isn’t required, and minimal odor gets produced. Easy to work with. That still surprises people.
Q: What makes ABS better for functional parts? Durability was built into ABS from the start. Higher temperatures get handled well, impact resistance exceeds PLA, and acetone vapor can be used for smoothing. Trickier printing conditions are the trade-off.
Q: Is PETG really the best of both worlds? Fair point to ask. Easier printing does get combined with better strength than PLA by PETG, plus crystal clear results are achieved when printed right. Not quite as tough as ABS, though.
Q: Can I use the same printer settings for all three? Look, different temperatures and bed settings are needed by each material. Cooler conditions are preferred by PLA, heat everywhere is needed by ABS, and PETG falls between them. Worth adjusting each time.